Soil organic matter in a mixed ley cropping system, R3-0021, Säby
- Local identifier
- R3-0021, C-55-1970
- Years operational
- 1970—
- Objective
- Investigating the development of soil organic matter in cropping systems with grass/clover ley.
- Description
- Soil organic matter develops differently in cropping systems with only cereals and cropping systems with grass/clover ley. In the R3-0020 experimental series, the effect on soil organic matter from a crop rotation with only cereals is tested at four different levels of nitrogen addition. Additionally, the effect of removing the straw versus leaving it in field is tested. In the R3-0021 experimental series the crop rotation instead consists of three years of mixed ley, followed by re-sowing of grass/clover with barley as cover crop, and three year of ley again. Treatments consist of four levels of nitrogen. Both series has experiments on four locations: Lanna, Lönnstorp, Röbäcksdalen and Säby.
- Data Access Statement
- Available to any researcher on request
- Data Access Notes
- Access form here: https://www.slu.se/en/faculties/nj/this-is-the-nj-faculty/collaborative-centres-and-major-research-platforms/long-term-field-experiments-/
- Data license
- Don't know
- Data policy
- Don't know
- Organization
- The Swedish University of Agricultural Sciencesresearch organisation
- Person
- Dr Sabina Braunexperiment managerSLUSoil and Environment
Site: Säby
- Type
- research station field
- Local code
- C-55-1970
- Location
- UppsalaUpplandSweden
- Geographic location
- 59.8192, 17.646
- Visits permitted?
- Yes
- Visiting arrangements
- See https://www.slu.se/en/departments/crop-production-ecology/resurser/faltforsok-slu-uppsala/
Design period: (1970—)
- Design Type
- Randomized complete block design
- Description
- This experiment is part of a series of four experiments with mixed lay production at four levels of nitrogen addition. Nitrogen is added in spring as mineral fertilizer (Axan, N28). The crop rotation is one year of barley undersown with grass and clover, then three years of unbroken ley. At the experiment located at Röbäcksdalen no barley is included in the rotation, and grass and clover is re-sown every fourth year. Ley is harvested twice per season, except for year 1 at Röbäcksdalen when only one harvest is taken. Crop samples are collected every year and top soil samples every 4th year. Phosphorus and potassium removed by harvest is calculated for each four year rotation and the corresponding amount is applied as mineral fertilizer during the following rotation. Other plant nutrients are added as needed. Chemical pest and weed control are used.
- Design description
- Four blocks (replicates), four treatments, 16 plots in total.
- Crops
Crop Years grown grass clover leys spring barley - Crop Rotation
- Unnamed
- 1spring barleyundersown with ley
- 2grass clover leys
- 3grass clover leys
- 4grass clover leys
- Factor
- Factor name
- Factor levels
- nitrogen fertilizer exposure
N0 (0 )
N50 (50 kgN/ha)
Application frequency: annuallyN100 (100 kgN/ha)
Application frequency: annuallyN150 (150 kgN/ha)
Application frequency: annually
- Measurements
Variable Material Units Frequency Scale Comment forage yield grass clover leys grain yield trait spring barley nitrogen content All crops phosphorous content All crops potassium content All crops soil pH Soil every 4th year plant available phosphorous Soil every 4th year Ammonium acetate lactate (AL) extraction potassium content Soil every 4th year Ammonium acetate lactate (AL) extraction calcium content Soil every 4th year Ammonium acetate lactate (AL) extraction magnesium content Soil every 4th year Ammonium acetate lactate (AL) extraction
Related publications
- Soil Organic C Development in Cereal and Ley Systems. Data from 20 Years Old Swedish Field Experiments